lapd and fbi on the trail of the white powder which turned out not to be anthrax. she has been at or near the both top of the leaderboard. tonight is double elimination. this morning sarah palin is weighing in as her daughter overcomes difficult week on the dance floor. hear what she has to say, coming up at 7:00 on gma. we are getting word that singer and dance choreographer, paula abdul, is going to be a guest judge on "dancing with the stars" next week that. should get quite a response. >>> tonight on "nightline" part 2 of interview with the first lady. cynthia mcfadden sat down with the first lady. >> i rarely step foot in the west wing. people are shocked when they see me there. but i rarely walk in that office, because the truth is, he's got so many wonderful advisers, so i don't have the -- >> in the interview the first lady talks about how the president recruited her brother to help convince her that a white house run would be a good idea. you can watch part 2 of the first lady's exclusive interview tonight on "nightline" at 11:35 after the abc7 news at 11.